qinglan.Canvas.RenderInterface = qinglan.Canvas.Class(function(){

	this.visible = true;
	this.__useSelfRender = false;
	
}).statics({
	draw : function(context) {
		 throw 'The draw function must be implemented!';
	},
	update : function(context) {
		 throw 'The update function must be implemented!';
	},
	destory: function(){
		 throw 'The destory function must be implemented!';
	}
})
